PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 536

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
22.5.1
The generation of a USB memory address for USB access (read or write) depends on
the EPNum (endpoint number) information, which has been transmitted to the USB
module during the software initialization procedure. The EPNum information is used for
the selection of an endpoint specific base address register. As the maximum data packet
length of each endpoint can individually be programmed, there are some fixed start
addresses for the endpoints. The user program defines the base address for the first
data byte of the corresponding endpoint by writing the endpoint specific base address
register EPBAn. The length depends on the amount of data to be read or written. The
user must take care to assign a buffer space at least as large as the maximum packet
size of the endpoint.
The address of the currently accessed byte in the USB memory area of the selected
endpoint is defined by an address offset which must be added to the endpoint base
address in order to get the correct address for the USB memory buffer. The structure is
shown in figure 22-19.
Figure 22-19 USB Memory Address Generation (Example: 9+1 Endpoints)
PAGE0
PAGE1
PAGE2
PAGE3
PAGE4
PAGE5
PAGE6
PAGE7
PAGE8
PAGE9
EPBA0
EPBA1
EPBA2
EPBA3
EPBA4
EPBA5
EPBA6
EPBA7
EPBA8
EPBA9
An7
An7
An7
An7
An7
An7
An7
An7
An7
An7
Memory Buffer Address Generation
An6
An6
An6
An6
An6
An6
An6
An6
An6
An6
An5
An5
An5
An5
An5
An5
An5
An5
An5
An5
Note: The EPBAn and ADROFFn registers should be programmed as
required.
EPBAn
+ ADROFFn
An4
An4
An4
An4
An4
An4
An4
An4
An4
An4
An3
An3
An3
An3
An3
An3
An3
An3
An3
An3
PAGEn
AD7
An7
0
0
0
0
0
0
0
0
0
0
0
AD6 AD5 AD4 AD3 AD2 AD1 AD0
An6
0
0
0
0
0
0
0
0
0
0
0
An7- An3
AO5 AO4 AO3 AO2 AO1 AO0
An5
536
An4
MUX
An3
0
0
actual endpoint
EPNum of the
USBmem.vsd
USB Module
Memory
Page 0
PSB 21473
USB
2003-03-31
Page 1
INCA-D